98chevy2500SS
Specializes in Accessories 101
Damn, you guys are lucky to be getting 15 mpg+ with 285s and 3:73s, I can barley squeak past 12.5 on a good day. If you are going to 37s, I'd swap to 4:56s. On an OEM wheel, their width is only 7", I'd get something a little wider than that, most people seem to recommend at least 9" or 10" of width. Just my opinion though, rock the stockers if you want, my dad put 315/75r16s on some 6 inch dually rims and they are a bit on the narrow side, so they bow in the middle, I'm guessing that's what your 37s will do as well. They will work, but your tread probably won't wear correctly.